Chuck



- Nov.5 13, 192s.

H. E. KEMPToN Er AL.

cak

Original Filed June 20, 1924 Patented Nov. 13, i928.

HERBERT E. KEMPTON, OF CHICAGO, rumors', Ann KEITH Ff. GALMMOREAND RAY- Moran M. WOYTYCH, or FOND DU Lao, wisconsin,v A'ssrenons, nv'ivrnsnn Assiem- MENTSfTO lII-IE'HEALD MACHNE COMPANY; 'GF WOBCESTER, lMASSAC-HlSETTS,

CORPORATION oF MAssAcHUsETTs. l

cHUoK y Appneationmee .ffu'n 2O, 19e/i, serial` No. Valar/a Renewed seawater ei.. ieee.

,Onur invention relates to improvements vin chucks,'and has particular reference tochucks of the general type in which the part being chucked is clamped in a centered position by a plurality o flspring-pressed members.A

Theprimaryobject of our inventionis to vprovide a .work holding chuck which is simple, sturdy1 aQCl short Vin construction; easy and quickto load and unload; and ldesigned to iesiliently clamp tbe part being chucked firmly and accurately in a centered position the outer face of the frontA plate, thereby/'adapting' the chuck to handle special parts, vsucli portable work shuttles,rlarge and irregular in shape.

Further objects. and advantages will become apparent as the description lproceeds.

In the drawings, Y Y Figure 1- is a sectional view taken in theV plane Vof'line, 1,41 of` Fig. 2 bodying thefeatures of our invention, with -a workshnttleshown in elevation clamped against the front face in true centered. rela tion tothe axis of rotation.

Fig'. 2' is a front view of the chuck with the slinttle removed. l q

Fig. 3 is a sectional view similar to 1 of a slightly modified form of chucky with a work piece of irregular shape clamped in cenf tered position.

While we haveshown in thedrawings and will herein describe in detail the preferred embodiment of our invention, itis to be understood that we do not thereby intend to limit vthe same tothe construction disclosed, but aim 1in the-appended claims to cover all modifications and alternative constructions falling within the spiritand scope of the invention.

Referring to the drawings, 10 represents the body of the chuck. which in the present instance is hollow and cylindrical lin form, andis closed at its rear end by a radial flange 11 defining a concentric axial opening 12. A

plurality of spaced clearance openings 13 ein.

tend through the cylindrical wall ofthe body 10, and serve to conduct away any abrasive particles, dust, coolant, or other reuseA `thrown ofi' in the machine Operation into the chuck. To support the chuck for axial rotation the flange 11 is rigidly secured by bolts 14 to a circular fiange plate lvformed on the .front end of a rotatable work spindle 16.- EX- tending through the spindle 16 and into the chuck body 10`is a pnsli baril? hav,-

ing a nut 18 threaded onto vitsfforward end.; The front end of the bodyl 1.0"is .Closed by a circular face platefl) held in place 'by a plurality of screws- 20, and central axial' opening 21.111 Mounted 'inan annular notch 22f'orine'd the 'plate 19 at the front edge of the opening 21 isa hardenedcentering l'arisli-A ing 23 which is secure'din place by screws2el.

As shown in ig. 1, the bushing is adapted to receive an annular centering lot 2 5 formed on va work shuttle-26, Intlie Vpresent 1nstance,theshuttle 26when clamped against' the b iishing23 is designedIL to'siipport an engine piston with its wrist-pinholes v28 in true centered relation to fthe chuck. 'The shuttle 26 disClQScd inV Fig. il is not our invention y' Woytych andis claimed ina ycopending apbut `is .the invention of; Galliinore and plication"Serial lilo.` 728,116 filed July 1924. In Fig. 3 the eentering'bushing 2 3 is designed to engage anannular notch 29 which 1s suitablyformed in one end of anydesired y work blank 30,such as an1 arri/iat ureV coreior .motors'an`d is concentric withthe'bore 3 1v of the blank to be internally ing elementv 32.

Slidebly extending' .thlou ground byra grind- ,eh theta@ Plate 191er@ a' PlurallwfefClemens members 'Ofv ples 33. harms enlarged. simular head-s34- v011.

their outer 'endsadaptedvtoengage thev part' being chucked toclamp it against the bushing 23. Herein we have shown a pair of diametrically opposed. pins 33 which are shown in Fig. l as engaging 'grooves 35 in the upper and lower ysides of the shuttle 26, and in Fiv'.

.3,as ttingV over the outer end ofthe wor blank 30. The inner ends of the pins 33 are each reducedin size to provide successive annular spaced shoulders 36 and 37. A circu. lar disk 38 having" a central open1ng`39 is mounted on the pins 33 between the shoulders 36 andv37, and is retained thereon by nuts 40 threaded against the shoulders 37. The shoulders V36and 37 of each set arespaced apartA sufficiently to provide a' limited lost motion connection of the disk 38 with the-pins Y33, thereby allowing the latter a limited Y' axis ofthe chuck, engage respectively 'at their i opposite ends in depressions 42 formedl in the faceplate 19 and: depressionsV 43 .formed in Vthefront side of the disk 38, and-serve to the` action of the springs 41 to release the party by forcing V:the nut`18 on the floating push i orf shapes.

move the kpins 33' rearwardly into,V resilient engagement with the Vpart 'being chucked. The pins 33 can be moved forwardly against bar 17 against the rear surfaceof the diskl 38. It will be seen that .the part to be chucked Y can be quickly placed in a centered position, and can then be clamped in place'byreleasing the bar 17. The chuckis extremely simple in construction, and' can be adapted to handle parts of .many different kinds,.sizes,

front face of the bushing 23, the

againstfthe y l be` made short,A thereby saving chuck can,

space. Y

lV e claim as our invention: e A 1. A chuck comprising, in combination, a hollow cylindrical body substantially closed at the rear end, a. circular vface plate closing the front end' of said body, a ycentering bushing in said 'face plate, a pair of clamping members slidably extending through said face plate at vopposite sides-of said bushing, said members having enlarged disk shaped outer ends,a disk positioned inrsaidfbody and mounted `on the inner ends of said members,

said disk having a lost-'motion connection with j each ,of said members, aplurality of spaced Y springs respectively engaging at their opposite ends with said `face plate andsaid disk tomove the outer ends ofsaid members i y positioned to`engage said disk to move saidv .members forwardly. n f

rearwardly toward said bushing, and means f2.' A'chuck having, lin combinatioma body,

a face plate secured tothe front of said body,

a, bushingicentrally"mountedvin said face Since the blanks: are' clampedy a face plate, aplurality ofclainping members 7 extending through said face plate, a disk having a lost motion connection with said members permitting a limited independent movement of eachmember, spring-means for moving said men'ibers in one direction into clamping engagementwith the work, and means for engaging said disk to move said members inV the otherjdirection. Y e

j f1. p A chuck-having, in combinatiom'a body, a face plate, a pair of clamping members lo-v cated insaid body and extending through said faceplate atv diametrically opposite points, a

disk through which'the rear endsofv said clamping `me1nbers extend, said clamping members being loosely fastened to. said diskv whereby to' allow limited independent longitudinal movement thereof and resulting in allowing rotative movement of said' clamping members,"means to move said disk to actuate saidy clamping members, and-a Vdisk shaped enlargement von the front of each clamping member outside said facel plate, whereby an article tobe held by said chuck can be placedxin position sidewa s and said clamping members retracted to iold` it, the,

exact angular position of said clamping mem'- bers being' immaterial. Y f e In testimony whereof we havehereunto afhxed our signatures.

HERBERT E. VKRMPTON.V

VKEITH F. oALLiMoins. v

RAYMOND MWOYrYoH 

